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<FONT color="green">001</FONT>    /*<a name="line.1"></a>
<FONT color="green">002</FONT>     * Copyright (C) 2008-2012, fluid Operations AG<a name="line.2"></a>
<FONT color="green">003</FONT>     *<a name="line.3"></a>
<FONT color="green">004</FONT>     * FedX is free software: you can redistribute it and/or modify<a name="line.4"></a>
<FONT color="green">005</FONT>     * it under the terms of the GNU Affero General Public License as<a name="line.5"></a>
<FONT color="green">006</FONT>     * published by the Free Software Foundation, either version 3 of the<a name="line.6"></a>
<FONT color="green">007</FONT>     * License, or (at your option) any later version.<a name="line.7"></a>
<FONT color="green">008</FONT>     * <a name="line.8"></a>
<FONT color="green">009</FONT>     * This program is distributed in the hope that it will be useful,<a name="line.9"></a>
<FONT color="green">010</FONT>     * but WITHOUT ANY WARRANTY; without even the implied warranty of<a name="line.10"></a>
<FONT color="green">011</FONT>     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the<a name="line.11"></a>
<FONT color="green">012</FONT>     * GNU Affero General Public License for more details.<a name="line.12"></a>
<FONT color="green">013</FONT>     * <a name="line.13"></a>
<FONT color="green">014</FONT>     * You should have received a copy of the GNU Affero General Public License<a name="line.14"></a>
<FONT color="green">015</FONT>     * along with this program.  If not, see &lt;http://www.gnu.org/licenses/&gt;.<a name="line.15"></a>
<FONT color="green">016</FONT>     */<a name="line.16"></a>
<FONT color="green">017</FONT>    <a name="line.17"></a>
<FONT color="green">018</FONT>    package com.fluidops.fedx;<a name="line.18"></a>
<FONT color="green">019</FONT>    <a name="line.19"></a>
<FONT color="green">020</FONT>    import java.util.HashMap;<a name="line.20"></a>
<FONT color="green">021</FONT>    import java.util.HashSet;<a name="line.21"></a>
<FONT color="green">022</FONT>    import java.util.Scanner;<a name="line.22"></a>
<FONT color="green">023</FONT>    import java.util.Set;<a name="line.23"></a>
<FONT color="green">024</FONT>    import java.util.concurrent.ConcurrentSkipListSet;<a name="line.24"></a>
<FONT color="green">025</FONT>    import java.util.regex.MatchResult;<a name="line.25"></a>
<FONT color="green">026</FONT>    import java.util.regex.Pattern;<a name="line.26"></a>
<FONT color="green">027</FONT>    <a name="line.27"></a>
<FONT color="green">028</FONT>    import org.apache.log4j.Logger;<a name="line.28"></a>
<FONT color="green">029</FONT>    import org.openrdf.query.BooleanQuery;<a name="line.29"></a>
<FONT color="green">030</FONT>    import org.openrdf.query.GraphQuery;<a name="line.30"></a>
<FONT color="green">031</FONT>    import org.openrdf.query.MalformedQueryException;<a name="line.31"></a>
<FONT color="green">032</FONT>    import org.openrdf.query.Query;<a name="line.32"></a>
<FONT color="green">033</FONT>    import org.openrdf.query.QueryLanguage;<a name="line.33"></a>
<FONT color="green">034</FONT>    import org.openrdf.query.TupleQuery;<a name="line.34"></a>
<FONT color="green">035</FONT>    import org.openrdf.repository.Repository;<a name="line.35"></a>
<FONT color="green">036</FONT>    import org.openrdf.repository.RepositoryConnection;<a name="line.36"></a>
<FONT color="green">037</FONT>    import org.openrdf.repository.RepositoryException;<a name="line.37"></a>
<FONT color="green">038</FONT>    <a name="line.38"></a>
<FONT color="green">039</FONT>    import com.fluidops.fedx.exception.FedXRuntimeException;<a name="line.39"></a>
<FONT color="green">040</FONT>    import com.fluidops.fedx.structures.QueryInfo;<a name="line.40"></a>
<FONT color="green">041</FONT>    <a name="line.41"></a>
<FONT color="green">042</FONT>    <a name="line.42"></a>
<FONT color="green">043</FONT>    /**<a name="line.43"></a>
<FONT color="green">044</FONT>     * QueryManager to manage queries. <a name="line.44"></a>
<FONT color="green">045</FONT>     * <a name="line.45"></a>
<FONT color="green">046</FONT>     * a) Management of running queries (abort, finish)<a name="line.46"></a>
<FONT color="green">047</FONT>     * b) Factory to create queries<a name="line.47"></a>
<FONT color="green">048</FONT>     * <a name="line.48"></a>
<FONT color="green">049</FONT>     * @author Andreas Schwarte<a name="line.49"></a>
<FONT color="green">050</FONT>     */<a name="line.50"></a>
<FONT color="green">051</FONT>    public class QueryManager {<a name="line.51"></a>
<FONT color="green">052</FONT>    <a name="line.52"></a>
<FONT color="green">053</FONT>            <a name="line.53"></a>
<FONT color="green">054</FONT>            public static Logger log = Logger.getLogger(QueryManager.class);<a name="line.54"></a>
<FONT color="green">055</FONT>            <a name="line.55"></a>
<FONT color="green">056</FONT>            <a name="line.56"></a>
<FONT color="green">057</FONT>            // singleton behavior: initialized in constructor of FederationManager<a name="line.57"></a>
<FONT color="green">058</FONT>            protected static QueryManager instance = null;<a name="line.58"></a>
<FONT color="green">059</FONT>            protected static QueryManager getInstance() {<a name="line.59"></a>
<FONT color="green">060</FONT>                    return instance;<a name="line.60"></a>
<FONT color="green">061</FONT>            }<a name="line.61"></a>
<FONT color="green">062</FONT>            <a name="line.62"></a>
<FONT color="green">063</FONT>            protected final FederationManager federationManager;<a name="line.63"></a>
<FONT color="green">064</FONT>            protected final Repository repo;<a name="line.64"></a>
<FONT color="green">065</FONT>            protected final RepositoryConnection conn;<a name="line.65"></a>
<FONT color="green">066</FONT>            protected Set&lt;QueryInfo&gt; runningQueries = new ConcurrentSkipListSet&lt;QueryInfo&gt;();<a name="line.66"></a>
<FONT color="green">067</FONT>            protected HashMap&lt;String, String&gt; prefixDeclarations = new HashMap&lt;String, String&gt;();<a name="line.67"></a>
<FONT color="green">068</FONT>            <a name="line.68"></a>
<FONT color="green">069</FONT>            protected QueryManager(FederationManager federationManager, Repository repo) {<a name="line.69"></a>
<FONT color="green">070</FONT>                    this.federationManager = federationManager;<a name="line.70"></a>
<FONT color="green">071</FONT>                    this.repo = repo;<a name="line.71"></a>
<FONT color="green">072</FONT>                    try     {<a name="line.72"></a>
<FONT color="green">073</FONT>                            this.conn = repo.getConnection();<a name="line.73"></a>
<FONT color="green">074</FONT>                    } catch (RepositoryException e) {<a name="line.74"></a>
<FONT color="green">075</FONT>                            throw new FedXRuntimeException(e);              // should never occur<a name="line.75"></a>
<FONT color="green">076</FONT>                    }<a name="line.76"></a>
<FONT color="green">077</FONT>            }<a name="line.77"></a>
<FONT color="green">078</FONT>            <a name="line.78"></a>
<FONT color="green">079</FONT>            <a name="line.79"></a>
<FONT color="green">080</FONT>            /**<a name="line.80"></a>
<FONT color="green">081</FONT>             * Add the query to the set of running queries, queries are identified via a unique id<a name="line.81"></a>
<FONT color="green">082</FONT>             * @param queryInfo<a name="line.82"></a>
<FONT color="green">083</FONT>             */<a name="line.83"></a>
<FONT color="green">084</FONT>            public void registerQuery(QueryInfo queryInfo) {<a name="line.84"></a>
<FONT color="green">085</FONT>                    assert runningQueries.contains(queryInfo) : "Duplicate query: query " + queryInfo.getQueryID() + " is already registered.";<a name="line.85"></a>
<FONT color="green">086</FONT>                    runningQueries.add(queryInfo);<a name="line.86"></a>
<FONT color="green">087</FONT>            }<a name="line.87"></a>
<FONT color="green">088</FONT>            <a name="line.88"></a>
<FONT color="green">089</FONT>            public Set&lt;QueryInfo&gt; getRunningQueries() {<a name="line.89"></a>
<FONT color="green">090</FONT>                    return runningQueries;<a name="line.90"></a>
<FONT color="green">091</FONT>            }<a name="line.91"></a>
<FONT color="green">092</FONT>            <a name="line.92"></a>
<FONT color="green">093</FONT>            public void abortQuery(QueryInfo queryInfo) {<a name="line.93"></a>
<FONT color="green">094</FONT>                    synchronized (queryInfo) {<a name="line.94"></a>
<FONT color="green">095</FONT>                            if (!runningQueries.contains(queryInfo))<a name="line.95"></a>
<FONT color="green">096</FONT>                                    return;         <a name="line.96"></a>
<FONT color="green">097</FONT>                            log.info("Aborting query " + queryInfo.getQueryID());<a name="line.97"></a>
<FONT color="green">098</FONT>                            federationManager.getJoinScheduler().abort(queryInfo.getQueryID());<a name="line.98"></a>
<FONT color="green">099</FONT>                            federationManager.getUnionScheduler().abort(queryInfo.getQueryID());<a name="line.99"></a>
<FONT color="green">100</FONT>                            runningQueries.remove(queryInfo);<a name="line.100"></a>
<FONT color="green">101</FONT>                    }<a name="line.101"></a>
<FONT color="green">102</FONT>            }<a name="line.102"></a>
<FONT color="green">103</FONT>            <a name="line.103"></a>
<FONT color="green">104</FONT>            public void finishQuery(QueryInfo queryInfo) {<a name="line.104"></a>
<FONT color="green">105</FONT>                    runningQueries.remove(queryInfo);<a name="line.105"></a>
<FONT color="green">106</FONT>            }<a name="line.106"></a>
<FONT color="green">107</FONT>            <a name="line.107"></a>
<FONT color="green">108</FONT>            public boolean isRunning(QueryInfo queryInfo) {<a name="line.108"></a>
<FONT color="green">109</FONT>                    return runningQueries.contains(queryInfo);<a name="line.109"></a>
<FONT color="green">110</FONT>            }<a name="line.110"></a>
<FONT color="green">111</FONT>            <a name="line.111"></a>
<FONT color="green">112</FONT>            /**<a name="line.112"></a>
<FONT color="green">113</FONT>             * Register a prefix declaration to be used during query evaluation. If a <a name="line.113"></a>
<FONT color="green">114</FONT>             * known prefix is used in a query, it is substituted in the parsing step.<a name="line.114"></a>
<FONT color="green">115</FONT>             * <a name="line.115"></a>
<FONT color="green">116</FONT>             * If prefix is null, the corresponding entry is removed.<a name="line.116"></a>
<FONT color="green">117</FONT>             * <a name="line.117"></a>
<FONT color="green">118</FONT>             * @param prefix<a name="line.118"></a>
<FONT color="green">119</FONT>             *                              a common prefix, e.g. rdf<a name="line.119"></a>
<FONT color="green">120</FONT>             * @param namespace<a name="line.120"></a>
<FONT color="green">121</FONT>             *                              the corresponding namespace, e.g. "http://www.w3.org/1999/02/22-rdf-syntax-ns#"<a name="line.121"></a>
<FONT color="green">122</FONT>             */<a name="line.122"></a>
<FONT color="green">123</FONT>            public void addPrefixDeclaration(String prefix, String namespace) {<a name="line.123"></a>
<FONT color="green">124</FONT>                    if (prefix==null) {<a name="line.124"></a>
<FONT color="green">125</FONT>                            prefixDeclarations.remove(prefix);<a name="line.125"></a>
<FONT color="green">126</FONT>                            return;<a name="line.126"></a>
<FONT color="green">127</FONT>                    }<a name="line.127"></a>
<FONT color="green">128</FONT>                    <a name="line.128"></a>
<FONT color="green">129</FONT>                    prefixDeclarations.put(prefix, namespace);<a name="line.129"></a>
<FONT color="green">130</FONT>            }<a name="line.130"></a>
<FONT color="green">131</FONT>            <a name="line.131"></a>
<FONT color="green">132</FONT>            <a name="line.132"></a>
<FONT color="green">133</FONT>            /**<a name="line.133"></a>
<FONT color="green">134</FONT>             * Prepare a tuple query which uses the underlying federation to evaluate the query.&lt;p&gt;<a name="line.134"></a>
<FONT color="green">135</FONT>             * <a name="line.135"></a>
<FONT color="green">136</FONT>             * The queryString is modified to use the declared PREFIX declarations, see <a name="line.136"></a>
<FONT color="green">137</FONT>             * {@link Config#getPrefixDeclarations()} for details.<a name="line.137"></a>
<FONT color="green">138</FONT>             * <a name="line.138"></a>
<FONT color="green">139</FONT>             * @param queryString<a name="line.139"></a>
<FONT color="green">140</FONT>             * @return<a name="line.140"></a>
<FONT color="green">141</FONT>             * @throws MalformedQueryException<a name="line.141"></a>
<FONT color="green">142</FONT>             */<a name="line.142"></a>
<FONT color="green">143</FONT>            public static TupleQuery prepareTupleQuery(String queryString) throws MalformedQueryException {<a name="line.143"></a>
<FONT color="green">144</FONT>                                    <a name="line.144"></a>
<FONT color="green">145</FONT>                    Query q = prepareQuery(queryString);<a name="line.145"></a>
<FONT color="green">146</FONT>                    if (!(q instanceof TupleQuery))<a name="line.146"></a>
<FONT color="green">147</FONT>                            throw new FedXRuntimeException("Query is not a tuple query: " + q.getClass());<a name="line.147"></a>
<FONT color="green">148</FONT>                    return (TupleQuery)q;<a name="line.148"></a>
<FONT color="green">149</FONT>            }<a name="line.149"></a>
<FONT color="green">150</FONT>            <a name="line.150"></a>
<FONT color="green">151</FONT>            /**<a name="line.151"></a>
<FONT color="green">152</FONT>             * Prepare a tuple query which uses the underlying federation to evaluate the query.&lt;p&gt;<a name="line.152"></a>
<FONT color="green">153</FONT>             * <a name="line.153"></a>
<FONT color="green">154</FONT>             * The queryString is modified to use the declared PREFIX declarations, see <a name="line.154"></a>
<FONT color="green">155</FONT>             * {@link Config#getPrefixDeclarations()} for details.<a name="line.155"></a>
<FONT color="green">156</FONT>             * <a name="line.156"></a>
<FONT color="green">157</FONT>             * @param queryString<a name="line.157"></a>
<FONT color="green">158</FONT>             * @return<a name="line.158"></a>
<FONT color="green">159</FONT>             * @throws MalformedQueryException<a name="line.159"></a>
<FONT color="green">160</FONT>             */<a name="line.160"></a>
<FONT color="green">161</FONT>            public static GraphQuery prepareGraphQuery(String queryString) throws MalformedQueryException {<a name="line.161"></a>
<FONT color="green">162</FONT>                                    <a name="line.162"></a>
<FONT color="green">163</FONT>                    Query q = prepareQuery(queryString);<a name="line.163"></a>
<FONT color="green">164</FONT>                    if (!(q instanceof GraphQuery))<a name="line.164"></a>
<FONT color="green">165</FONT>                            throw new FedXRuntimeException("Query is not a graph query: " + q.getClass());<a name="line.165"></a>
<FONT color="green">166</FONT>                    return (GraphQuery)q;<a name="line.166"></a>
<FONT color="green">167</FONT>            }<a name="line.167"></a>
<FONT color="green">168</FONT>            <a name="line.168"></a>
<FONT color="green">169</FONT>            /**<a name="line.169"></a>
<FONT color="green">170</FONT>             * Prepare a boolean query which uses the underlying federation to evaluate the query.&lt;p&gt;<a name="line.170"></a>
<FONT color="green">171</FONT>             * <a name="line.171"></a>
<FONT color="green">172</FONT>             * The queryString is modified to use the declared PREFIX declarations, see <a name="line.172"></a>
<FONT color="green">173</FONT>             * {@link Config#getPrefixDeclarations()} for details.<a name="line.173"></a>
<FONT color="green">174</FONT>             * <a name="line.174"></a>
<FONT color="green">175</FONT>             * @param queryString<a name="line.175"></a>
<FONT color="green">176</FONT>             * @return<a name="line.176"></a>
<FONT color="green">177</FONT>             * @throws MalformedQueryException<a name="line.177"></a>
<FONT color="green">178</FONT>             */<a name="line.178"></a>
<FONT color="green">179</FONT>            public static BooleanQuery prepareBooleanQuery(String queryString) throws MalformedQueryException {<a name="line.179"></a>
<FONT color="green">180</FONT>                                    <a name="line.180"></a>
<FONT color="green">181</FONT>                    Query q = prepareQuery(queryString);<a name="line.181"></a>
<FONT color="green">182</FONT>                    if (!(q instanceof BooleanQuery))<a name="line.182"></a>
<FONT color="green">183</FONT>                            throw new FedXRuntimeException("Unexpected query type: " + q.getClass());<a name="line.183"></a>
<FONT color="green">184</FONT>                    return (BooleanQuery)q;<a name="line.184"></a>
<FONT color="green">185</FONT>            }<a name="line.185"></a>
<FONT color="green">186</FONT>            <a name="line.186"></a>
<FONT color="green">187</FONT>            <a name="line.187"></a>
<FONT color="green">188</FONT>            static Pattern prefixCheck = Pattern.compile(".*PREFIX .*", Pattern.CASE_INSENSITIVE | Pattern.DOTALL);<a name="line.188"></a>
<FONT color="green">189</FONT>            static Pattern prefixPattern = Pattern.compile("PREFIX[ ]*(\\w*):[ ]*&lt;(\\S*)&gt;", Pattern.CASE_INSENSITIVE | Pattern.DOTALL);<a name="line.189"></a>
<FONT color="green">190</FONT>            <a name="line.190"></a>
<FONT color="green">191</FONT>            /**<a name="line.191"></a>
<FONT color="green">192</FONT>             * Prepare a {@link Query} which uses the underlying federation to evaluate the SPARQL query.&lt;p&gt;<a name="line.192"></a>
<FONT color="green">193</FONT>             * <a name="line.193"></a>
<FONT color="green">194</FONT>             * The queryString is modified to use the declared PREFIX declarations, see <a name="line.194"></a>
<FONT color="green">195</FONT>             * {@link Config#getPrefixDeclarations()} for details.<a name="line.195"></a>
<FONT color="green">196</FONT>             * <a name="line.196"></a>
<FONT color="green">197</FONT>             * @param queryString<a name="line.197"></a>
<FONT color="green">198</FONT>             * @return<a name="line.198"></a>
<FONT color="green">199</FONT>             * @throws MalformedQueryException<a name="line.199"></a>
<FONT color="green">200</FONT>             */<a name="line.200"></a>
<FONT color="green">201</FONT>            public static Query prepareQuery(String queryString) throws MalformedQueryException {<a name="line.201"></a>
<FONT color="green">202</FONT>                    QueryManager qm = getInstance();<a name="line.202"></a>
<FONT color="green">203</FONT>                    if (qm==null)<a name="line.203"></a>
<FONT color="green">204</FONT>                            throw new FedXRuntimeException("QueryManager not initialized, used FedXFactory methods to initialize FedX correctly.");<a name="line.204"></a>
<FONT color="green">205</FONT>                    <a name="line.205"></a>
<FONT color="green">206</FONT>                    <a name="line.206"></a>
<FONT color="green">207</FONT>                    if (qm.prefixDeclarations.size()&gt;0) {<a name="line.207"></a>
<FONT color="green">208</FONT>                            <a name="line.208"></a>
<FONT color="green">209</FONT>                            /* we have to check for prefixes in the query to not add<a name="line.209"></a>
<FONT color="green">210</FONT>                             * duplicate entries. In case duplicates are present<a name="line.210"></a>
<FONT color="green">211</FONT>                             * Sesame throws a MalformedQueryException<a name="line.211"></a>
<FONT color="green">212</FONT>                             */<a name="line.212"></a>
<FONT color="green">213</FONT>                            if (prefixCheck.matcher(queryString).matches())<a name="line.213"></a>
<FONT color="green">214</FONT>                                    queryString = qm.getPrefixDeclarationsCheck(queryString) + queryString;<a name="line.214"></a>
<FONT color="green">215</FONT>                            else<a name="line.215"></a>
<FONT color="green">216</FONT>                                    queryString = qm.getPrefixDeclarations() + queryString;<a name="line.216"></a>
<FONT color="green">217</FONT>                    }<a name="line.217"></a>
<FONT color="green">218</FONT>                    <a name="line.218"></a>
<FONT color="green">219</FONT>                    Query q;<a name="line.219"></a>
<FONT color="green">220</FONT>                    try     {<a name="line.220"></a>
<FONT color="green">221</FONT>                            q = qm.conn.prepareQuery(QueryLanguage.SPARQL, queryString);<a name="line.221"></a>
<FONT color="green">222</FONT>                    } catch (RepositoryException e) {<a name="line.222"></a>
<FONT color="green">223</FONT>                            throw new FedXRuntimeException(e);      // cannot occur<a name="line.223"></a>
<FONT color="green">224</FONT>                    }<a name="line.224"></a>
<FONT color="green">225</FONT>                    <a name="line.225"></a>
<FONT color="green">226</FONT>                    // TODO set query time<a name="line.226"></a>
<FONT color="green">227</FONT>                    <a name="line.227"></a>
<FONT color="green">228</FONT>                    return q;<a name="line.228"></a>
<FONT color="green">229</FONT>            }<a name="line.229"></a>
<FONT color="green">230</FONT>            <a name="line.230"></a>
<FONT color="green">231</FONT>            <a name="line.231"></a>
<FONT color="green">232</FONT>            /**<a name="line.232"></a>
<FONT color="green">233</FONT>             * Get the prefix declarations that have to be prepended to the query.<a name="line.233"></a>
<FONT color="green">234</FONT>             * <a name="line.234"></a>
<FONT color="green">235</FONT>             * @return<a name="line.235"></a>
<FONT color="green">236</FONT>             */<a name="line.236"></a>
<FONT color="green">237</FONT>            protected String getPrefixDeclarations() {<a name="line.237"></a>
<FONT color="green">238</FONT>                    StringBuilder sb = new StringBuilder();<a name="line.238"></a>
<FONT color="green">239</FONT>                    for (String namespace : prefixDeclarations.keySet()) {<a name="line.239"></a>
<FONT color="green">240</FONT>                            sb.append("PREFIX ").append(namespace).append(": &lt;")<a name="line.240"></a>
<FONT color="green">241</FONT>                                            .append(prefixDeclarations.get(namespace)).append("&gt;\r\n");<a name="line.241"></a>
<FONT color="green">242</FONT>                    }<a name="line.242"></a>
<FONT color="green">243</FONT>                    return sb.toString();<a name="line.243"></a>
<FONT color="green">244</FONT>            }<a name="line.244"></a>
<FONT color="green">245</FONT>            <a name="line.245"></a>
<FONT color="green">246</FONT>            /**<a name="line.246"></a>
<FONT color="green">247</FONT>             * Get the prefix declarations that have to be added while considering<a name="line.247"></a>
<FONT color="green">248</FONT>             * prefixes that are already declared in the query. The issue here is<a name="line.248"></a>
<FONT color="green">249</FONT>             * that duplicate declaration causes exceptions in Sesame<a name="line.249"></a>
<FONT color="green">250</FONT>             * <a name="line.250"></a>
<FONT color="green">251</FONT>             * @param queryString<a name="line.251"></a>
<FONT color="green">252</FONT>             * @return<a name="line.252"></a>
<FONT color="green">253</FONT>             */<a name="line.253"></a>
<FONT color="green">254</FONT>            protected String getPrefixDeclarationsCheck(String queryString) {<a name="line.254"></a>
<FONT color="green">255</FONT>                    <a name="line.255"></a>
<FONT color="green">256</FONT>                    Set&lt;String&gt; queryPrefixes = findQueryPrefixes(queryString);<a name="line.256"></a>
<FONT color="green">257</FONT>                    <a name="line.257"></a>
<FONT color="green">258</FONT>                    StringBuilder sb = new StringBuilder();<a name="line.258"></a>
<FONT color="green">259</FONT>                    for (String prefix : prefixDeclarations.keySet()) {<a name="line.259"></a>
<FONT color="green">260</FONT>                            if (queryPrefixes.contains(prefix))<a name="line.260"></a>
<FONT color="green">261</FONT>                                    continue;       // already there, do not add<a name="line.261"></a>
<FONT color="green">262</FONT>                            sb.append("PREFIX ").append(prefix).append(": &lt;")<a name="line.262"></a>
<FONT color="green">263</FONT>                                            .append(prefixDeclarations.get(prefix)).append("&gt;\r\n");<a name="line.263"></a>
<FONT color="green">264</FONT>                    }<a name="line.264"></a>
<FONT color="green">265</FONT>                    return sb.toString();<a name="line.265"></a>
<FONT color="green">266</FONT>            }<a name="line.266"></a>
<FONT color="green">267</FONT>            <a name="line.267"></a>
<FONT color="green">268</FONT>            <a name="line.268"></a>
<FONT color="green">269</FONT>            /**<a name="line.269"></a>
<FONT color="green">270</FONT>             * Find all prefixes declared in the query<a name="line.270"></a>
<FONT color="green">271</FONT>             * @param queryString<a name="line.271"></a>
<FONT color="green">272</FONT>             * @return<a name="line.272"></a>
<FONT color="green">273</FONT>             */<a name="line.273"></a>
<FONT color="green">274</FONT>            protected static Set&lt;String&gt; findQueryPrefixes(String queryString) {<a name="line.274"></a>
<FONT color="green">275</FONT>                    <a name="line.275"></a>
<FONT color="green">276</FONT>                    HashSet&lt;String&gt; res = new HashSet&lt;String&gt;();<a name="line.276"></a>
<FONT color="green">277</FONT>                    <a name="line.277"></a>
<FONT color="green">278</FONT>                    Scanner sc = new Scanner(queryString);<a name="line.278"></a>
<FONT color="green">279</FONT>                    while (true) {<a name="line.279"></a>
<FONT color="green">280</FONT>                            while (sc.findInLine(prefixPattern)!=null) {<a name="line.280"></a>
<FONT color="green">281</FONT>                                    MatchResult m = sc.match();<a name="line.281"></a>
<FONT color="green">282</FONT>                                    res.add(m.group(1));<a name="line.282"></a>
<FONT color="green">283</FONT>                            }<a name="line.283"></a>
<FONT color="green">284</FONT>                            if (!sc.hasNextLine())<a name="line.284"></a>
<FONT color="green">285</FONT>                                    break;<a name="line.285"></a>
<FONT color="green">286</FONT>                            sc.nextLine();<a name="line.286"></a>
<FONT color="green">287</FONT>                    }<a name="line.287"></a>
<FONT color="green">288</FONT>                    <a name="line.288"></a>
<FONT color="green">289</FONT>                    return res;<a name="line.289"></a>
<FONT color="green">290</FONT>            }<a name="line.290"></a>
<FONT color="green">291</FONT>            <a name="line.291"></a>
<FONT color="green">292</FONT>            public static void main(String[] args) {<a name="line.292"></a>
<FONT color="green">293</FONT>    <a name="line.293"></a>
<FONT color="green">294</FONT>            }<a name="line.294"></a>
<FONT color="green">295</FONT>    <a name="line.295"></a>
<FONT color="green">296</FONT>    }<a name="line.296"></a>




























































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